Firmware is used to describe small programs that are not changeable (except for updates) inside an electronic device. Your television remote has firmware even, but I'm not concerned about someone hacking into that and changing the channel on you. Cameras have firmware, cell phones have firmware, printers have firmware, but what I am most concerned about is your wireless router. Firmware updates are released to patch security holes in a vendor's firmware. Most home users never update their firmware and aren't even aware that it needs to be updated.
Now you know. What are you going to do? Well, firmware is product specific. If you are concerned about your particular device, check the vendor's website to see if they have firmware updates and follow their instructions on how to apply it. If you have problems applying the firmware, contact the vendor. If you receive your appliance from your ISP, contact your ISP for instructions on how to do this. You do not want to wipe out their specific settings, so follow their instructions carefully.
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